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<?php function sum(float ...$numbers) : float { $_intsum = null; $intsum = function ($sum, array $numbers) use(&$_intsum) { if (count($numbers) == 0) { return $sum; } $number = array_shift($numbers); $sum += $number; var_dump($sum); var_dump($numbers); return $_intsum($sum, $numbers); }; $_intsum = $intsum; return $intsum(0, $numbers); } echo sum(1, 2, 3, 4); echo PHP_EOL; echo sum(1.5, 2, 3, 4); echo PHP_EOL; try { sum('a', 'b', 'c'); } catch (Error $e) { echo $e->getMessage(); }
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
float(1) array(3) { [0]=> float(2) [1]=> float(3) [2]=> float(4) } float(3) array(2) { [0]=> float(3) [1]=> float(4) } float(6) array(1) { [0]=> float(4) } float(10) array(0) { } 10 float(1.5) array(3) { [0]=> float(2) [1]=> float(3) [2]=> float(4) } float(3.5) array(2) { [0]=> float(3) [1]=> float(4) } float(6.5) array(1) { [0]=> float(4) } float(10.5) array(0) { } 10.5 sum(): Argument #1 must be of type float, string given, called in /in/r66l3 on line 28
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 float(1) array(3) { [0]=> float(2) [1]=> float(3) [2]=> float(4) } float(3) array(2) { [0]=> float(3) [1]=> float(4) } float(6) array(1) { [0]=> float(4) } float(10) array(0) { } 10 float(1.5) array(3) { [0]=> float(2) [1]=> float(3) [2]=> float(4) } float(3.5) array(2) { [0]=> float(3) [1]=> float(4) } float(6.5) array(1) { [0]=> float(4) } float(10.5) array(0) { } 10.5 sum(): Argument #1 must be of type float, string given, called in /in/r66l3 on line 28
Output for 7.4.0 - 7.4.33
float(1) array(3) { [0]=> float(2) [1]=> float(3) [2]=> float(4) } float(3) array(2) { [0]=> float(3) [1]=> float(4) } float(6) array(1) { [0]=> float(4) } float(10) array(0) { } 10 float(1.5) array(3) { [0]=> float(2) [1]=> float(3) [2]=> float(4) } float(3.5) array(2) { [0]=> float(3) [1]=> float(4) } float(6.5) array(1) { [0]=> float(4) } float(10.5) array(0) { } 10.5 Argument 1 passed to sum() must be of the type float, string given, called in /in/r66l3 on line 28
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 7.3.33
float(1) array(3) { [0]=> float(2) [1]=> float(3) [2]=> float(4) } float(3) array(2) { [0]=> float(3) [1]=> float(4) } float(6) array(1) { [0]=> float(4) } float(10) array(0) { } 10 float(1.5) array(3) { [0]=> float(2) [1]=> float(3) [2]=> float(4) } float(3.5) array(2) { [0]=> float(3) [1]=> float(4) } float(6.5) array(1) { [0]=> float(4) } float(10.5) array(0) { } 10.5 Argument 3 passed to sum() must be of the type float, string given, called in /in/r66l3 on line 28
Output for 5.6.8 - 5.6.28
Parse error: syntax error, unexpected ':', expecting '{' in /in/r66l3 on line 3
Process exited with code 255.
Output for 5.5.24 - 5.5.35
Parse error: syntax error, unexpected '.', expecting '&' or variable (T_VARIABLE) in /in/r66l3 on line 3
Process exited with code 255.

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